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        2021年6月4日 上午
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            <h1 style="display: none">Docker 操作使用命令</h1>
            
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              <p>简单说说 <span class="label label-primary">Docker</span> 优点,能简化我们配置环境的问题,假设现在在现有 <span class="label label-primary">linux</span> 服务器上安装一个需要依赖多个包的软件,需要在多台 <span class="label label-primary">linux</span> 安装同一软件时,将上一台机器的环境复制过来,简化安装。</p>
<h2 id="1-Docker-的主要用途"><a href="#1-Docker-的主要用途" class="headerlink" title="1. Docker 的主要用途"></a>1. Docker 的主要用途</h2><ul>
    <li>提供一次性的环境。比如,本地测试他人的软件、持续集成的时候提供单元测试和构建的环境。<span class="label label-warning">比如,在我机器可以运行,在你机器运行报错,这样问题的出现。</span> 
    </li>
    <li>提供弹性的云服务。因为 Docker 容器可以随开随关，很适合动态扩容和缩容。
    </li>
    <li>组建微服务架构。通过多个容器，一台机器可以跑多个服务，因此在本机就可以模拟出微服务架构。
    </li>
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<h3 id="1-1-安装"><a href="#1-1-安装" class="headerlink" title="1.1. 安装"></a>1.1. 安装</h3><div class="hljs code-wrapper"><pre><code class="hljs Python">yum -y install docker-io</code></pre></div>
<h3 id="1-2-删除"><a href="#1-2-删除" class="headerlink" title="1.2. 删除"></a>1.2. 删除</h3><div class="hljs code-wrapper"><pre><code class="hljs Python">yum remove docker</code></pre></div>
<h3 id="1-3-删除"><a href="#1-3-删除" class="headerlink" title="1.3. 删除"></a>1.3. 删除</h3><div class="hljs code-wrapper"><pre><code class="hljs Python">service docker start</code></pre></div>

<h3 id="1-4-停用"><a href="#1-4-停用" class="headerlink" title="1.4. 停用"></a>1.4. 停用</h3><div class="hljs code-wrapper"><pre><code class="hljs Python">service docker stop</code></pre></div>

<h3 id="1-5-重启"><a href="#1-5-重启" class="headerlink" title="1.5. 重启"></a>1.5. 重启</h3><div class="hljs code-wrapper"><pre><code class="hljs Python">service docker restart</code></pre></div>
<h2 id="2-镜像加速"><a href="#2-镜像加速" class="headerlink" title="2. 镜像加速"></a>2. 镜像加速</h2><p>修改 <span class="label label-primary">/etc/docker/daemon.json</span> 文件并添加上 registry-mirrors 键值</p>
<div class="hljs code-wrapper"><pre><code class="hljs Python">&#123;
  <span class="hljs-string">&quot;registry-mirrors&quot;</span>: [<span class="hljs-string">&quot;http://hub-mirror.c.163.com&quot;</span>]
&#125;</code></pre></div>
<p class="note note-info">
然后重新启动下docker服务: service docker restart
</p>

<h2 id="3-Docker-操作容器命令"><a href="#3-Docker-操作容器命令" class="headerlink" title="3. Docker 操作容器命令"></a>3. Docker 操作容器命令</h2><div class="hljs code-wrapper"><pre><code class="hljs Python">docker pull <span class="hljs-built_in">id</span>/name     拉取镜像
docker ps <span class="hljs-built_in">id</span>/name       查看运行容器
docker ps -a <span class="hljs-built_in">id</span>/name    查看所有容器的状态
docker start/stop <span class="hljs-built_in">id</span>/name    启动/停止某个容器
docker attach <span class="hljs-built_in">id</span>        进入某个容器(使用exit退出后容器也跟着停止运行)
docker <span class="hljs-built_in">exec</span> -it <span class="hljs-built_in">id</span>  bash 或 /<span class="hljs-built_in">bin</span>/sh  启动一个伪终端以交互式的方式进入某个容器(使用exit退出后容器不停止运行)
docker images 查看本地镜像
docker rm <span class="hljs-built_in">id</span>/name 删除某个容器</code></pre></div>

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